function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azadbakhsh, Saeed & Nozari, Jamasb', 1],
    ['Casale, Achille', 1],
    ['Curcic, Srecko & Vesovic, Nikola & Kuraica, Milos', 2],
    ['Hristovski, Slavčo & Guéorguiev, Borislav', 7],
    ['Kostova, Rumyana & Gueorguiev, Borislav', 2],
    ['Lohaj, Roman & Ceplik, David & Lakota, Jan', 1],
    ['Quéinnec, Eric & Ollivier, Eric', 2],
    ['Reboleira, Ana Sofia P. S. & Ortuño, Vicente M.', 1],
    ['Čeplík, Dávid', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);